Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a754e93ff1f6569…

MALICIOUS

PDF

46.4 KB Created: 2020-08-01 05:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e53b03bc4127459f7c8249cbf5f94a1c SHA-1: 0806c9951a102f7286d0bbd77c260a0325d7a6db SHA-256: 0a754e93ff1f65690d0e66fa95164faf2820db966949e167ab1074c7a51833ec
162 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector and a large number of embedded links suggests an attempt to lead the user to harmful content or engage in SEO manipulation for malicious purposes.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=yesterday%2527+s+tractors+for+sale
    • http://files.thewholisticrevolution.com/uploads/1/3/1/3/131398076/572931ec3e9.pdf
    • http://files.holleyslandscaping.com/uploads/1/3/1/4/131409574/tujerurusamajuz.pdf
    • http://files.moderndayparablesrcf.com/uploads/1/3/0/7/130740049/zadigapuvunib-sejazole.pdf
    • http://files.ithembafsc.org/uploads/1/3/0/9/130969435/metali-mexamezivomu-baxekasorezoto-raluwitisi.pdf
    • http://files.hosshakukempon.com/uploads/1/3/1/8/131857419/xumavagonokotun-lakebosibuvodad-gapizufuda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/29470383708.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/42217671367.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/99687857523.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/lesamixezatege.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/tidekusekolukibixagetoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/52333394650.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/vawukakuzakipisesu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/lojafutam.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/pivabafunaliretudapon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4211/0631/files/82903481870.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/mipuxumukubalekepud.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/watch_bad_girls_club_season_16.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_off000069da.bin
d2a9763700ea7397975514b35c9e7dbc814507ae658820731868b2eb2b78eb0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DA 4744 bytes
font_01_sfnt_off00007a19.bin
cef41adcfbff057142294a3db08a5fadb8cabc3b78c0d708ffdf46c1ad1e26d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 10608 bytes
font_02_sfnt_off00009e5b.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5B 4324 bytes

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