Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaee4c14a6c8c22…

MALICIOUS

PDF

40.2 KB Created: 2020-10-24 02:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e90dff25b10934869e505207246efa9a SHA-1: 1f2c8eae5ba80fda674e1e6649fc9a1db3ced56a SHA-256: 7aaee4c14a6c8c222fd8117b9e4faa661660833f6044fa3b85b539f22daeae6d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/123?keyword=brinkmann+grill+user+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a user manual, a common lure for phishing or malware delivery. The presence of numerous external PDF links, many pointing to S3 buckets, indicates a link farm strategy, likely for SEO poisoning or distributing further malicious content.

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.me/123?keyword=brinkmann+grill+user+manual In PDF document text
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/8e303116097d.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/2219830.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/gigufoteworakef-bezari.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/golevinujenig.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/1d556596d58.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/vugofavezele-lexupiraroz.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/jakaj.pdfIn PDF document text
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/wowuwi-lobefabam-kebala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f8f363f5a10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f8c382df3a95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/vometemetamafikujegoju.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/butedujibijukixa.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/genetica_medica_thompson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/showbox_download_apk_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9153/5018/files/ducati_streetfighter_1098_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8083/5782/files/auditing_and_assurance_services_an_integrated_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7628/1031/files/adguard_apk_android_4.4.2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/stanley_kubrick_a_biography_vincent_lobrutto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6205/3014/files/gifted_and_talented_round_rock_isd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9207/3376/files/california_franchise_tax_board_form_100_instructions.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 5116 bytes
SHA-256: a9dfbc437220d8bb5b46d7002da3e937c718893e817f5d66a37448d4db131a8d
font_01_sfnt_off000070fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 10024 bytes
SHA-256: f5160a84b9669a8d242a64980c5a7aea0caa0be90ecc21ae01bbee56985157ad

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