Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d87061404e8585…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 13:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09d07c1e2e95ada1f8e87535dafdc66b SHA-1: 448e3d101b9f6a8bf01515a7b30025ed929ea361 SHA-256: b1d87061404e858597bc00212e0a3fc693050de22fc6dbef08461b0b565a323f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at ttraff.com, suggesting a phishing or malware distribution attempt. The document body text, though heavily obfuscated, also contains the URL https://ttraff.com/wb?keyword=icpd%20adalah%20pdf, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wb?keyword=icpd%20adalah%20pdf
    • http://files.healdsburgflowers.com/uploads/1/3/1/4/131436978/vabofikokiziwojav.pdf
    • http://pegafi.momoand.co/uploads/1/3/1/3/131380600/6e136d.pdf
    • http://files.soapboxpo.com/uploads/1/3/0/7/130776073/886475be700.pdf
    • http://xedujinu.storyneeds.com/uploads/1/3/0/7/130739553/8412315.pdf
    • http://files.taketimeforyourselfmassage.com/uploads/1/3/1/8/131856567/0ce71ee.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/hillbilly_elegy_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/bullet_for_my_valentine_merchendise.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/acid_fast_staining_technique.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vofelowuloluvazoriwonub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/febufuwopijuwifatokel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/vowofinis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/basic_civil_and_environmental_engineering_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/wefedaginolabolamududetam.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/verizon_dns_servers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2548/8279/files/anestesia_local_en_odontopediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/tulipubulevixilubu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/zakevaji.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008182.bin
b04f463d0943d15cc24e753e70210f006bf296eabe06d842c70be8b4bb8ac2da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 4904 bytes
font_01_sfnt_off00009233.bin
471702e9d707d7072ebaf75b2a1d3ead183aed46c5bcf98dc21a84c938e80dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9233 10160 bytes

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