Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ae651bf2afc58f…

MALICIOUS

PDF

37.4 KB Created: 2020-08-17 11:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca8b1d0d5fdf9cad77605e8441047281 SHA-1: fddcda50be719b66bd5d77402c6d0043f91f94f1 SHA-256: 63ae651bf2afc58fcacb9c7adcb87fd7c167d56fc0a70930a9b4746c6e5454ee
202 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector infrastructure (ttraff.ru) and another to a PDF hosted on a compromised domain. The document body, though partially obfuscated, mentions 'Bbmp trade license certificate' and includes the malicious URL, suggesting a phishing or social engineering lure. The presence of many external PDF links indicates a link farm used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=bbmp+trade+license+certificate
    • http://files.premierbeachpropertymanagement.com/uploads/1/3/1/1/131164095/9030500.pdf
    • http://files.seanrashbowling.com/uploads/1/3/0/9/130969593/muguwatol_pajedogujivol_rumaxamixi_posepakupolux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/vafox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2629/files/eleonora_edgar_allan_poe_english.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/alquimista_paulo_coelho_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/kozozibexuven.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/ravojifoxilusawoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/lifemil.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/einfhrung_in_die_politische_philosophie.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_off00005411.bin
226084354b51b81441df0d4b0edc27ab2bc8775ab0c3d1f783429dd8e35a9c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5411 5492 bytes
font_01_sfnt_off00006695.bin
4632c064f12bf3ca130f062c0de7f0e0294cf9f86bbf9eedf6b755f02f8289fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6695 10284 bytes

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