Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fae56e78a91230…

MALICIOUS

PDF

43.2 KB Created: 2020-07-26 00:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af1da47dd1b488d8e4060722204b24fe SHA-1: a00702c45cb848c21c40ca980ebfc02b550974ef SHA-256: 02fae56e78a91230662fdd8724ee1f39a2f715862a183ff288ecdde0e24d3dfc
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 external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to a known malicious redirector, indicating a potential phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous external links and a malicious redirector strongly suggests a malicious intent to lure users to harmful content.

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.cc/pify?keyword=static+electricity+lab+answer+key
    • http://files.infernalcandles.com/uploads/1/3/1/3/131380045/49ec34a.pdf
    • http://files.freekidstories.org/uploads/1/3/1/3/131379054/wapixabotopu.pdf
    • http://files.countywicklowppn.ie/uploads/1/3/0/7/130740097/2655114.pdf
    • http://files.desmoinesmodelaires.com/uploads/1/3/2/6/132695556/7231477.pdf
    • http://files.welac.org/uploads/1/3/1/3/131380305/zonav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/fafixiveliloxazedatisuxat.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/26688080372.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/4306859790.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/68634388263.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/nilagekaxojaganizijo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/86717028058.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/dovotefonememafer.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/98340212573.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/832220817.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/79065794969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.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_off00006de6.bin
837dcc40c4f2da249de12aae89d5f50e67e6e725b1bc39d9bdd9ab8e4ddc20d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 4972 bytes
font_01_sfnt_off00007ed9.bin
a21863e6cf4b322801851a4b20648fa4a4408bf54f898f5a5390ed2d4ea0976d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED9 9620 bytes