Malicious PDF — malware analysis report

Static analysis result for SHA-256 126187a11d9e775a…

MALICIOUS

PDF

49.1 KB Created: 2020-08-31 04:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f3e88e77e16acab2be744c4b8bdf942 SHA-1: 06bb2d79bc184af47948ec4c0db7511270e1ae96 SHA-256: 126187a11d9e775ad3e1c6bb97514b9dbaea68059fa8de4d108ac4f14eb54617
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, https://ttraff.com/wix?keyword=four+veronica+roth, is identified as a known malicious redirector. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to drive traffic to malicious infrastructure, likely as part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wix?keyword=four+veronica+roth
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/dabekoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/xivilikozazuvenovukimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/93832931221.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/choose_the_right_sentence_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/32942770101.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/asme_section_ix_training.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/96394077724.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/bivarunesutuvelokesilux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/kixonolixetexupavuzeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56966684837.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/pidifibapopivenuwinuxab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/kexeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/1900/0229/files/reliability_data_analysis_with_minitab.pdf
    • https://static.usrfiles.com/ugd/e33828_39c66c06adcf4662948417cd9372a196.pdf
    • https://static.usrfiles.com/ugd/b8c837_a48fdee1769d4996ab14cc2f69dff205.pdf
    • https://static.usrfiles.com/ugd/37428b_daedebba16d64ceba6b69790c1378364.pdf
    • https://static.usrfiles.com/ugd/565485_3ff86da47cf5433b867c1d1f6ebbd617.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_off000082fe.bin
6cadae94beb209531152699c5726fd71f99b82004937dc437bff36d08b584eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82FE 4692 bytes
font_01_sfnt_off000092ef.bin
a0cc0799623794ce26052c8511f157b82e12cda20b30aed5b24c829a6646dab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92EF 11240 bytes

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