Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bf753c3c967b89…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 04:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaf08978beeb427474bb4368bae2db11 SHA-1: 25e3a98b4046dbe8d7b90ad55fedc06808c26f49 SHA-256: 60bf753c3c967b891e5a194a6401ff8d995d0a1a00dec4e1dea5c8447e187ceb
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to FDA reporting requirements, likely a lure. The presence of numerous Shopify-hosted PDF links suggests a link farm or SEO manipulation tactic to obscure the malicious destination.

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=fda+medical+device+adverse+event+reporting+requirements
    • http://wudejeju.karuklanguageresources.org/uploads/1/3/1/8/131871721/filisozonovor_witulada_teginazugita_bedafosanilaw.pdf
    • http://nulad.thehague2600.com/uploads/1/3/0/8/130873951/siwisipuzepu_nujupezufin_firuvuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/daring_rakhwala_song.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/fevidarosivijudadus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/86337674707.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/fefukozoramawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9016/5403/files/pazuguvazuxiziloziked.pdf
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/flat_penny_isaac.pdf
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/vapazefuxategifafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/limiting_reactants_and_excess_reactants_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/30514018835.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/watch_ink_masters_season_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/alcatel_one_touch_pop_c5_firmware.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b98.bin
7e7a2f67770f720e28b9c4f27f2ff26e0c44bff8033679cf0c0ff51cd243df06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B98 5416 bytes
font_01_sfnt_off00006de8.bin
d83ee59cfac77f30edc29c482a01d00e4352f620baabc920727b19524a255886		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE8 9248 bytes
font_02_sfnt_off00008d7e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7E 4324 bytes

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