Malicious PDF — malware analysis report

Static analysis result for SHA-256 85333faf507a7820…

MALICIOUS

PDF

43.1 KB Created: 2020-07-16 04:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 569bee0ca5bdbb936094b826451daa1a SHA-1: 08a89721cc4838844619b3b394af2ecca698a576 SHA-256: 85333faf507a7820f6a69b8eee1cb2208d2c4a587592ef48ba824da7475cd0b9
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominent link identified as a malicious redirector. This redirector is disguised as a lure for a 'free user manual for iPhone 7', indicating a phishing or scam attempt. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or distribute malicious content broadly. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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.com/wb?keyword=free%20user%20manual%20for%20iphone%207 In PDF document text
    • http://files.elizabethmariephoto.com/uploads/1/3/2/7/132740281/kabiluvir.pdfIn PDF document text
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdfIn PDF document text
    • http://files.amvetspost29.com/uploads/1/3/1/4/131453853/zapasijawujimuvirite.pdfIn PDF document text
    • http://files.alteanunez.net/uploads/1/3/1/4/131453982/jizemakobeb.pdfIn PDF document text
    • http://files.telluridefacials.com/uploads/1/3/1/3/131380158/rizenexired.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/1/0432/3803/1518/files/wukupileweli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1219/4457/files/48419215782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/seropikuselapotevisewi.pdfIn PDF document text
    • https://mugomij.files.wordpress.com/2020/07/65722318137.pdfIn PDF document text
    • https://tasutujonomo.files.wordpress.com/2020/07/xepikuzexawazuxutiwu.pdfIn PDF document text
    • https://pawojoteloje.files.wordpress.com/2020/06/31146528170.pdfIn PDF document text
    • https://zemijedo.files.wordpress.com/2020/07/xiwafamafej.pdfIn PDF document text
    • https://kadetalon.files.wordpress.com/2020/07/damudinenade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/pefoboveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lurexemip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/lijeguvanarep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/gasatitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/jejuvadebujutexesavim.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA6 4976 bytes
SHA-256: 69bf7989559fbcce3c7545098ca35315fcd4e187e185021898fdd76ac26bcf1f
font_01_sfnt_off00007c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5E 10224 bytes
SHA-256: fbdb129fb498d18b1a87124adae6ef1f1f1f5011e441bdaf9081f27ada005a5e