Malicious PDF — malware analysis report

Static analysis result for SHA-256 91db2e38d335658b…

MALICIOUS

PDF

64.4 KB Created: 2020-08-12 00:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7e300796206df7a9c8523e3b9157753 SHA-1: 34d79e43ab04ffbb15f771518bacf107c0ed4cba SHA-256: 91db2e38d335658b1b064a71cdb725a874fdc7bcc1766a0e2e75900d492eac69
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on platforms like Shopify. One prominent link directs users to 'ttraff.com', a known malicious redirector. The document body, though partially corrupted, contains text related to 'mapa turistico bolivia pdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector link confirms the attack pattern.

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=mapa+turistico+bolivia+pdf
    • http://files.midnightcoffeeinc.com/uploads/1/3/0/9/130969465/287f9.pdf
    • http://files.rebeccas.kitchen/uploads/1/3/0/8/130874595/dudidodijow-muwigariloda.pdf
    • http://rejivubi.coloradocattlewomen.com/uploads/1/3/1/4/131406532/zaramekam.pdf
    • http://files.julialye.com/uploads/1/3/1/3/131379219/towavosa.pdf
    • http://files.leonasleads.dog/uploads/1/3/1/4/131406629/8680331e4.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0946/files/nofonuvoxunesonowilok.pdf
    • https://cdn.shopify.com/s/files/1/0448/1299/2672/files/soluciones_hipotonicas_isotonicas_e_hipertonicas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/classification_of_carbohydrates_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4738/files/xovubuziworonebumedixi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3461/3659/files/78704215.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/types_of_bearing_skf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/illicit_financial_flows_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/18795763358.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/vixutuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/simekixonirene.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/educational_psychology_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1590/files/95422371344.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/rezaxesus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/gesenuduzemibevogudisi.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b024.bin
0e0b104c3c75be9e08b5f6e40d0e83c17c1b74ae4a25a63a5d9bbbd86ac6d07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB024 5356 bytes
font_01_sfnt_off0000c265.bin
f38603f8a150bac31d9e1a2c6e033b8020b586f4968a861de0384dc5a2cfc74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 11552 bytes
font_02_sfnt_off0000e81d.bin
cba5f74efde00b08572687be94f62dc809644252f25f49ebc515c3eae0593eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 2572 bytes

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