Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7894d3dbde6bb3…

MALICIOUS

PDF

72.7 KB Created: 2020-08-28 09:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e1219cedff3abb8064da60d57f0d23 SHA-1: 277bff0d1d2cd008c318dc73ab994531e013e919 SHA-256: fa7894d3dbde6bb378a29bc46af32243cfb6109a15626b1beb0c20f0abc2f7c8
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, many of which point to known malicious redirectors or suspicious domains. The primary malicious URL identified is 'https://ttraff.link/pify?keyword=grayish+green+eyes'. This indicates a likely attack pattern involving a link farm designed to lure users to potentially harmful content. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific intent beyond the malicious links.

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.link/pify?keyword=grayish+green+eyes
    • http://jugefawed.lenoratrussell.com/uploads/1/3/1/4/131414661/6579635.pdf
    • http://rumuparov.wellness-rising.com/uploads/1/3/0/7/130739723/46042a4c0e8df.pdf
    • http://files.mattifycosmetics.com/uploads/1/3/1/0/131070751/gaxuluxeposafige.pdf
    • http://zawobu.fhotosnearandfar.com/uploads/1/3/1/3/131383664/jawimezeforev.pdf
    • http://rabewa.agfeldtpapers.org/uploads/1/3/2/3/132303229/loratisamavawo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/lejexirowabedup.pdf
    • https://cdn.shopify.com/s/files/1/0447/0390/7993/files/wuvubidarat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/silverstrand_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/jamix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/gofimasabedizezawobex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5225/2829/files/62287700656.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/adda_247_di_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/49384963613.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2711/files/98079889041.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/sipazudekoviperazivi.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/
    • https://cdn.shopify.com/s/files/1/0447/0390/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd95.bin
7763532e99eaf5d39f8cc608561b32d61cc177a0e2a06f67862bed489232e160
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD95 5048 bytes
font_01_sfnt_off0000eecb.bin
9256c86e758cedbb9deea85f8d993c76a51c7a5f6b9bbeb9bd245328cdc1c8a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 11540 bytes