Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a93b72d1ac8a82…

MALICIOUS

PDF

45.5 KB Created: 2020-08-17 04:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32be07ab1ba347dab8d3b6617860c670 SHA-1: 952b0c4f7fce12d8b924128cbdd5b252ef2efdbb SHA-256: 60a93b72d1ac8a82c917f296be79489ef21424c730001073a2a35f1849d4e77b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=olx+pakistan++free', suggesting a lure for users interested in 'olx pakistan free'. Additionally, a large number of external PDF links were found, indicating a link farm, with one pointing to a Shopify domain. The ML classifier also strongly flagged this PDF as malicious.

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=olx+pakistan++free
    • http://files.digitalmuseumofwomen.org/uploads/1/3/0/7/130776225/mokaxekoxa.pdf
    • http://files.fbccw.org/uploads/1/3/0/7/130775676/0e938aedbfe108.pdf
    • http://files.akadeltapsiomega.org/uploads/1/3/2/8/132814136/wixunadejosuxu_lejorapit.pdf
    • http://files.bitcointresor.ch/uploads/1/3/0/7/130738993/jimokixepa-kuzatukuget-puvavi.pdf
    • http://nurip.maquelajacob.com/uploads/1/3/2/6/132696414/169ad3d767a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/vorege.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/wugemabijukis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6156/files/62831033247.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/water_logging_and_salinity.pdf
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/printable_pictograph_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/57680488013.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/national_osteoporosis_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/19087225062.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/82245134592.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_off000069cf.bin
681a960f5a525da6d7cd87da24b399a97eb3768458cc48f21862a0854ce1ca6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CF 5056 bytes
font_01_sfnt_off00007b04.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B04 1800 bytes
font_02_sfnt_off00008392.bin
ac3707a2c408bd8dc2b64d4d04d0bd9cecee3d50afe7ac9d7e7bf33be909300b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8392 11028 bytes

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