Malicious PDF — malware analysis report

Static analysis result for SHA-256 7265a7777daeae23…

MALICIOUS

PDF

52.9 KB Created: 2020-08-10 22:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4bb318bc8a516a7da6a9777e037c1d5 SHA-1: d24fbddcb22cefd81cd16ee81acbe17d27c8052d SHA-256: 7265a7777daeae234f823cf9d5ec6717993417e7f41d4fc133d5bad8df919e60
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources, including a known malicious redirector at 'https://ttraff.com/pify?keyword=artificial+intelligence+in+healthcare+pdf'. The document body, though heavily obfuscated, contains text related to 'artificial intelligence in healthcare pdf', suggesting a lure. The presence of numerous external PDF links, many pointing to potentially compromised or malicious domains, indicates a link farm or redirection strategy to deliver a payload. The ML classifier strongly flagged this PDF as malicious.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/pify?keyword=artificial+intelligence+in+healthcare+pdf
    • http://files.robertleebaptistchurch.org/uploads/1/3/2/6/132695596/nabininomuteforixe.pdf
    • http://files.bookmarksmagazine.com/uploads/1/3/1/0/131070625/c770b6c.pdf
    • http://files.upinsmokeonhill.com/uploads/1/3/0/7/130775953/mamubabiloxilufad.pdf
    • http://files.auntiemaileshawaiiangourmetfavorites.com/uploads/1/3/0/8/130874237/7030284.pdf
    • http://kuwobil.clinpsychsarah.com/uploads/1/3/1/4/131453267/najenot_wolepizojabal_jekafokiju_bozubixesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/jiwupinudoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4585/files/93981745098.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/liduzerexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7811/files/77657607404.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7400/files/lidafisitojojeloxotukin.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/dadebeperukugefat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/wijikoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/gedikote.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/95138903173.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/3790917826.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/liebermann_burchard_reaction_for_cholesterol.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_off0000908c.bin
0747205da5139af389ccd60256ea3f0d55d201cbe413bd5533fcb6e4d12b3b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908C 5228 bytes
font_01_sfnt_off0000a23e.bin
d3e50d257d0e6bf604e02288a902e214d175b568fe8e6c23e97ac9110c02d4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA23E 10480 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.