Malicious PDF — malware analysis report

Static analysis result for SHA-256 096b985e0d184f94…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 13:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4469636a41cf1444404760d1534a109 SHA-1: d04b6b7a38b346dc7e072a83681087f5f42add70 SHA-256: 096b985e0d184f94d5db1f0a833370d304279ea3fde4c339e6ca4d6df0398996
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is a common tactic for phishing or malware distribution. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=barreira+hematoencef%25C3%25A1lica+pdf as malicious. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm, with the first URL being https://cdn.shopify.com/s/files/1/0430/4669/9165/files/70505637365.pdf. The ML classifier also strongly indicated maliciousness.

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=barreira+hematoencef%25C3%25A1lica+pdf
    • http://files.customartsstudio.com/uploads/1/3/0/9/130969204/xezifonor.pdf
    • http://zotubu.philippschaz.com/uploads/1/3/0/8/130814017/wukabamedojumositu.pdf
    • http://renibiw.lauradunnart.com/uploads/1/3/2/6/132681947/35ea2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/70505637365.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/53602395575.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51106899687.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/47685037677.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/addison_wesley_science_10_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/mariner_15_hp_outboard_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/3263101949.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/xatogarawidazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/75787910835.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/75367826830.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/86511872852.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/kodopab.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_off000065ad.bin
1634f8cc5c64df904446d03bd3aaaf8b454f5799560226962b14c5b5c904e6c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 5288 bytes
font_01_sfnt_off000076ea.bin
3d91c1d2b7236b1deb85d671f7bb676c1b6b1516c1ff4b72c8376e69a58129c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 10912 bytes
font_02_sfnt_off00009a98.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A98 4324 bytes

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