Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b929054c83b8139…

MALICIOUS

PDF

50.2 KB Created: 2020-08-12 00:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8f5ec99a95f2e871c95470564c8cd03 SHA-1: 6e08bfc9273a146ec39fe40eb7ead453fc7c1bd0 SHA-256: 1b929054c83b8139dd0019806aa2f7f0247999dc27097641e288eaf87fd3e318
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a large number of embedded external links, characteristic of a link farm. One of these links, 'https://ttraff.cc/pify?keyword=bendix+quick+reference+pdf', points to known malicious redirector infrastructure. The document body contains obfuscated text and a reference to the malicious URL, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attack.

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=bendix+quick+reference+pdf
    • http://gelupepav.commerce-runningabusinessunit.com/uploads/1/3/2/6/132682076/d301d4.pdf
    • http://files.milestoneshomeinspections.net/uploads/1/3/0/8/130874474/5621387.pdf
    • http://files.nikkidisney.com/uploads/1/3/1/4/131408942/f1b4da.pdf
    • http://nevojapak.milwaukeedowntownchiropractic.com/uploads/1/3/0/9/130969761/faxamajuwulu.pdf
    • http://files.haveheartwellness.com/uploads/1/3/1/4/131454505/b958e899840820.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/static_gk_capsule_study_iq.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7456/files/denuvodajudajexanet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/gogobamanalijadufomuwuwan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/jobiwelisoxofosezuka.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/92407048583.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/dewajiguvilegamizivadul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8096/files/51754050043.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/dolam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/autism_behaviour_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/life_application_study_bible_niv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/figesipokinikaxizuzori.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/36494959352.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c95.bin
b835fd3bd030086f02180d4e406811b494869122a0b1abefee71733ef164314e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C95 4728 bytes
font_01_sfnt_off00007cae.bin
1a9da3d4ea6f525ecb5fddc98d97b7993c597dec0e0241cf8c43260e30cbc9cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAE 15512 bytes
font_02_sfnt_off0000ac3c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.