Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d31c117339848f…

MALICIOUS

PDF

57.3 KB Created: 2020-08-04 20:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33774fac0162a8f82861992f721ff953 SHA-1: f1e9d61d3be8a3b784a7056d6f5a8649ecacb56c SHA-256: 15d31c117339848fbaac30c8d1e716de54bb2da5cf2fdd32e70d8a0cd5f2e823
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about antiepileptic drugs. This suggests a phishing or scam attempt. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to obscure the malicious link. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a malicious intent.

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=antiepileptic+drugs+classification+pdf
    • http://purujo.gabcmemphis.org/uploads/1/3/1/3/131380126/e43784ab0b231.pdf
    • http://files.vegan-versions.com/uploads/1/3/2/7/132740362/3348172.pdf
    • http://files.katiedunivan.com/uploads/1/3/2/7/132741241/xugilirujazu_fatuvebizonosi_rikekijivokibof_zavonemewuvugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/54493674354.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/barber_adagio_for_strings_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/3865792863.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/lovugunegibonuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/xotenomil.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/57886454980.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78992801071.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/jawoviborukafiriva.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/13840264808.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/xijaxavuvojetewage.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/83806148864.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_off0000a309.bin
75972cb81952f00eb0cfc82271275ecd7d008eb3c25e0207a31794ffcdc8601d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA309 5312 bytes
font_01_sfnt_off0000b52d.bin
faeb4890c24b8db0bd3cf2d560b2f8f8d6e5a3b390cdb4a54a0edb0f460cde5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB52D 10292 bytes