Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f02b06e0b82aa50…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 19:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6de3b9b1a14d7a0193c9248b768a6b SHA-1: 5a6c8fa165273c58c49a615ffec1075ff4edf172 SHA-256: 0f02b06e0b82aa50b5c16704c514234f695f7bf584d2f3e6138f73adc41259a8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=android+games+on+pc+laptop', suggesting a lure related to 'Android games on PC'. The presence of embedded URLs and the link farm structure indicate a phishing or scam attempt.

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.ru/pify?keyword=android+games+on+pc+laptop
    • http://files.topviewleadership.com/uploads/1/3/1/6/131636808/garum.pdf
    • http://files.renndrive.com/uploads/1/3/1/6/131637919/notusepoveb.pdf
    • http://rilawon.shelbygulllaird.com/uploads/1/3/1/6/131606758/a4cef19198845b.pdf
    • http://files.dsfshepherds.com/uploads/1/3/1/8/131872070/e47bd2211.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/gumerubobeleti.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6755/files/iron_fist_series_2_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/2496/3990/files/daily_english_news_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/89549791708.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/sakigiraririlaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/47141496113.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/soft_drinks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nidosavexurirevinuno.pdf
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/tusoxevubaduwuside.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/92955895148.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006480.bin
9e593ecdad96d78f54a79540dde77569e15ee669b8420d4843b410a9ca19f136
pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 5380 bytes
font_01_sfnt_off000076ae.bin
3c44cb243d990d5d8c75e26432e7cfadbfc5e3b47a97df759fa7521baf2fa283
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AE 10056 bytes