Malicious PDF — malware analysis report

Static analysis result for SHA-256 144ff68703b3b167…

MALICIOUS

PDF

55.5 KB Created: 2020-10-24 21:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eec8617c99589d7d83538e73e360c923 SHA-1: d1c5e603df611b57ffc6bddf20ffb3cb249f408e SHA-256: 144ff68703b3b167e37e7280db128c8f35d312bce880389bc63d13880f10e848
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/123?keyword=breadman+ultimate+10006+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f8a2384b3650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5f9282820eedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f893c15f0382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f8932fc88b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8c954be6154.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/9521004.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/bf7d2948e6.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/lewavefupuw_vezisulub.pdfIn PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/5651968.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/1097663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8999/2105/files/xexikowululakerujuzefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9343/5589/files/iso_14001_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6059/9202/files/26274811325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1609/3335/files/color_mixer_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/difference_between_baseband_and_broadband.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/compelled_by_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1111/1579/files/baby_first_food_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/lonulezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8209/2196/files/805326151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/php_is_numeric_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5155/6260/files/fagunelewatirovup.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000812d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812D 5192 bytes
SHA-256: 39017501f78ad23f433bc051f5065b9ecce368282d0dbec86c012e69006a4508
font_01_sfnt_off000092bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BB 11572 bytes
SHA-256: 42697ccc7fa4da210fb9fe4681f7b8d586c0d1da6738db9dd9f1bf5232c908c9
font_02_sfnt_off0000b9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B0 16224 bytes
SHA-256: 4362e686776cae9b5e877a8e5de4a1ff5ae9966626bcf1046762b8e3a01bbea2

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