Malicious PDF — malware analysis report

Static analysis result for SHA-256 174a42277f574d27…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 21:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fa7795c74607f5f4b497a2227801d66 SHA-1: 62e0318327c1f3f5a279e08c2ce364589cb9e8f0 SHA-256: 174a42277f574d27e8faf5a2791c8277466d8df113b67832fed4bb52bae7edc2
154 Risk Score

Malware Insights

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

The PDF contains a "First aid q" title and embeds a large number of links, including a critical redirector link to ttraff.com. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content, likely as part of a phishing or scam campaign. The numerous Shopify links appear to be a SEO link farm tactic to obscure the primary malicious redirector.

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.com/wix?keyword=first+aid+q
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0464/6676/0856/files/britain_for_learners_of_english_vk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/87850237113.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/gamidolukigojajidalago.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/wazikorovuwev.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/asbabun_nuzul_surah_al_fatihah.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/babuniz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30812088679.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/futugosin.pdf
    • https://static.usrfiles.com/ugd/ca32a8_cd7582f672b84edfbc0417ea3d425637.pdf
    • https://static.usrfiles.com/ugd/6d59ab_17483c194c39412d9bcc50403208245b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cd.bin
72d1fa6f1cf3533b75330b329868e3cc323d3d18449297e65ae9b783d04b1558
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 4324 bytes
font_01_sfnt_off00007369.bin
e77bb3a00b8e9727feba8e6306681a7ec683abe26df6c83e1848c9b506002b72
pdf-font-stream PDF embedded font (sfnt) at offset 0x7369 10360 bytes
font_02_sfnt_off0000969d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x969D 4324 bytes