Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f635f55a384f76a…

MALICIOUS

PDF

61.4 KB Created: 2020-10-30 00:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d6eef32b8978001ad25281f489e65a3f SHA-1: 385ddfd0c5bb0ea35d7f8cf5910216b73366049c SHA-256: 6f635f55a384f76ad9c93a12888f23e07a7e2cfd9685ab42429bb28bb6b70669
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host phishing content or distribute further malware. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, suggesting a coordinated effort to drive traffic to various sites. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate a malicious intent to compromise the user.

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/123?keyword=a+celebration+of+grandfathers+focus+questions+and+answers In PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/dupeni.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/9663030.pdfIn PDF document text
    • https://fipuvulozubonoj.weebly.com/uploads/1/3/4/3/134313175/4ac72ec55aee.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/fuxazomita.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/buwipufose.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/1/0432/1135/8372/files/polycom_vvx_300_series_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8012/5082/files/electric_grain_mills_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4517/4439/files/compound_personal_pronouns_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/checklist_of_controlling_behaviours.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/tamefetakebivubaxalavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7766/2875/files/xaxitobuxosuwovuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15cb90d1-511d-4aa0-b2b4-93471c409e5d/gaxuxasamizusakoduduli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/64996957539.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C0 14208 bytes
SHA-256: ea909f3fea4806a3114b0385f9564109320f20afedd585b61ee33ade02dde2cb
font_01_sfnt_off0000b0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F9 5632 bytes
SHA-256: aa4b8bfb53e1efa296657e34a8171cc38470ee1262e92d8be2847c3574e4d00c
font_02_sfnt_off0000c41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41B 10384 bytes
SHA-256: 1609238356c431a1a7eea9ac2ecab60ebcf52f4efcd57452bcf529d4142166b6

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