Malicious PDF — malware analysis report

Static analysis result for SHA-256 3114a7a8293cbfae…

MALICIOUS

PDF

39.9 KB Created: 2020-08-06 22:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f4a9f7b3f5c0decbea88e1df963b79 SHA-1: b072e7c17911fbc56b5734fa61a8d4a7ac3e80d4 SHA-256: 3114a7a8293cbfae62c2ddcf1606a8e1cb0c91dff77fbdaecff3ae17453b3df0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). The document body, though partially corrupted, contains text related to converting PDF to Word and the malicious URL, suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious.

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=convert+pdf+to+word+file+free
    • http://files.peopleright.net/uploads/1/3/1/3/131380177/kidal.pdf
    • http://files.mattiafagnonionlus.com/uploads/1/3/2/6/132682134/midefufa_lipejiv_bozipiwenum_pivijakez.pdf
    • http://files.zigzagfloorplans.com/uploads/1/3/1/4/131438460/4609813.pdf
    • http://files.bransoncitydiner.net/uploads/1/3/0/9/130969057/5172294.pdf
    • http://fusebug.spanawaylakemonstersbbc.com/uploads/1/3/0/8/130874207/3649243.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/15509530651.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9725/files/98387605006.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/41536165580.pdf
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/ziwowasuwepe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/wafimixizo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5363/5989/files/kusepowujupimozi.pdf
    • https://cdn.shopify.com/s/files/1/0450/6550/2872/files/cards_against_humanity_all_expansions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/65309796041.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/i_sleep_real_shit_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/63762037156.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/lefixiravawimozuninijiveg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e77.bin
b16436f17128922ab6347838571dd7820cfe05745debe327daaf2d520b11138c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E77 4704 bytes
font_01_sfnt_off00006e9e.bin
1e12c37407acbd3b0ac64c4a6a39ded07f51f073c515a8b8b58f4a93abe86952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9E 10588 bytes

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