Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c203e42023c3de…

MALICIOUS

PDF

51.2 KB Created: 2020-08-19 06:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d8333a0e438aac486f83f4eb72f5b6c SHA-1: c03a60aa6a49c4b3401aeb2fdecbe4b438151190 SHA-256: 62c203e42023c3de7754c03bd4b41a95b7426c843aba9b29b4e7c57dc0370b23
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of external links, many of which point to a redirector service. The primary redirector URL, https://ttraff.com/pify?keyword=diccionario+biblico+strong+pdf+gratis, is known to lead to malicious infrastructure. The document body is heavily obfuscated and appears to be a lure for users searching for specific PDF content, likely to drive traffic to 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.com/pify?keyword=diccionario+biblico+strong+pdf+gratis
    • http://vopixinux.cottonwoodhoops.com/uploads/1/3/1/4/131408024/65dbb18f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/wijubuzalotifusoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/jivazewinikimitemuzelo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/43251649175.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/driver_license_processing_centers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/57759763135.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7303/files/bullish_engulfing_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/linux_mint_wifi_driver.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_off00007fa7.bin
8a9c5b42e2b2c9c433e0f331fc13c21ca46079314d92536fe82676a60dd8ced8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 5464 bytes
font_01_sfnt_off0000923a.bin
9f59d394012b85dae761959b6502cdf866df303639ff7396b43f203bba669f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x923A 14800 bytes

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