Malicious PDF — malware analysis report

Static analysis result for SHA-256 173ffc0345a0b2ab…

MALICIOUS

PDF

48.4 KB Created: 2020-07-22 00:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 0658cf448179229c571549a25efd32d5 SHA-1: ace92781c7fc0c8f6ee3146594007a7d42c0beec SHA-256: 173ffc0345a0b2ab645d297a11d9d9f3f1b145603adf047797dc9fb911dfb180
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'premature ejaculation treatment pdf'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=premature%20ejaculation%20treatment%20pdf In PDF document text
    • http://files.icense.org/uploads/1/3/0/7/130740090/7994065.pdfIn PDF document text
    • http://files.dunbriste.com/uploads/1/3/2/6/132695805/755e15907f.pdfIn PDF document text
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdfIn PDF document text
    • http://files.mik9ac.com/uploads/1/3/0/7/130775071/nalomafavasorode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0983/3117/files/fowimedebuxiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/17769310166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/48299011157.pdfIn PDF document text
    • https://varotedip.files.wordpress.com/2020/06/17059086343.pdfIn PDF document text
    • https://jixemokubuxu.files.wordpress.com/2020/06/muwoxibopeju.pdfIn PDF document text
    • https://vowonagu.files.wordpress.com/2020/07/14325362943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/97516274754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/beman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/52498307581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/74395465986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/lidirepidixewepajaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/baporiwutugixiboxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/tarip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/16580113673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/4683366459.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 5084 bytes
SHA-256: 7e26068749e739d61fdf2ca80a2c4ae6816f70bda9ea23c63a71dcd1acc7d303
font_01_sfnt_off000091b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B9 10084 bytes
SHA-256: f32f1ccb9cb16ffe92514b97cb68aae727951d55a0c86900dce627f6156c8490

Open this report in the interactive analyzer, or submit your own file for analysis.