Malicious PDF — malware analysis report

Static analysis result for SHA-256 706b69de8f1bd5d2…

MALICIOUS

PDF

50.3 KB Created: 2020-08-22 23:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f6a41d51a411c7b428684640e1208b0 SHA-1: 8edc255c58aa5759ffd4849f854e8d20cae85f0a SHA-256: 706b69de8f1bd5d2ee40120ae190962aede42cf37c3c3e64627da9b0dd0ce660
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 redirector service known to host malicious content. The document body itself contains a link to the same redirector, suggesting an attempt to drive traffic to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection campaign.

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=work+instruction+template+for+manufacturing
    • http://files.okanagan.com/uploads/1/3/0/7/130776031/9986172.pdf
    • http://files.28bullets.com/uploads/1/3/1/4/131482826/3259541.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/bawijonutozakigijufunafus.pdf
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/nipazonidewozugofevewux.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3336/files/ap_macroeconomics_the_loanable_funds_market_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/61069536234.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/affirmative_form_of_past_continuous.pdf
    • https://cdn.shopify.com/s/files/1/0439/8609/2190/files/blind_melon_no_rain_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/48871109692.pdf
    • https://cdn.shopify.com/s/files/1/0434/2969/1558/files/nukewukijotekebux.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/55405096405.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/54472501481.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_off00008677.bin
f298f96f084849e1aa9198327a39162c0144ae48de69fb52d5b6751e824e0c13
pdf-font-stream PDF embedded font (sfnt) at offset 0x8677 5412 bytes
font_01_sfnt_off000098de.bin
7fb4470d812b0008784ebe4c2ea62eb6c49e1a114202c31a07aa158ad1724e2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x98DE 10244 bytes