Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d52f1c7cdb2d47…

MALICIOUS

PDF

39.8 KB Created: 2020-08-25 20:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20e8cc1747600929ad01c18979b6900 SHA-1: 3e57a58864b2f93879a76580d0024c2893f7b7e0 SHA-256: 72d52f1c7cdb2d476ea34f88634c8730b0d6e96cd4e3dbdf6d7c4b7c5f9c31e9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This suggests the document is designed to lure users to malicious sites. The ML classifier strongly supports the malicious verdict. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector heuristic indicate a likely intent to deliver a second-stage payload or phish for credentials.

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/pify?keyword=tmnt+character+sheet
    • http://pawexus.liiartsa.com.au/uploads/1/3/1/6/131637284/jawoven.pdf
    • http://files.evangelcommunitychurch.org/uploads/1/3/0/8/130874437/vomopuvuwo.pdf
    • http://zigijew.franklinlrc.com/uploads/1/3/2/6/132695569/5892493.pdf
    • http://files.mrei.ca/uploads/1/3/0/7/130776183/gabefexuzusodim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/47910114293.pdf
    • https://cdn.shopify.com/s/files/1/0433/1362/7294/files/32373999137.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/35207853878.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/laloju.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3363/files/rujupefexobiwupizozavejan.pdf
    • https://cdn.shopify.com/s/files/1/0462/4413/5066/files/kosotidomutatakig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/84142926863.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/31194358240.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/xukudakowisax.pdf
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/roremizulajaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/source_filmmaker_workshop_er.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_off00005e6f.bin
097456dee8bcb86893fdd510093de117ed03c39da11a71ce7f1f21c6e63daf30
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6F 4956 bytes
font_01_sfnt_off00006f11.bin
db4225ef3cf159ac2bb784fd0b9b61128ecb00b3f2875b90d038253bc450c08f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 10428 bytes