Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec89d7a3201b271…

MALICIOUS

PDF

45.8 KB Created: 2020-08-19 21:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 324a6a6e3ed8d4dc78a20d40095e4401 SHA-1: d01cb16068c6f6ee066a4cd97a01483d9e427385 SHA-256: 1ec89d7a3201b271617803815a11faa1ad14e32df5230305d93f41b9908ed1a0
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body contains garbled text but includes the same suspicious URL, suggesting it's the primary lure. The presence of numerous links indicates an attempt to distribute malicious content or phish users.

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.ru/pify?keyword=junior+ii+bauer+compressor+manual
    • http://files.safegrowth.org/uploads/1/3/2/6/132681976/wevagoritemomuzemu.pdf
    • http://pimaso.mosssnowsticksouthpacific.com/uploads/1/3/1/4/131407995/menifisegazisamejo.pdf
    • http://vunosutu.quadcitybouncy.com/uploads/1/3/2/7/132740478/soxutedibulelena.pdf
    • http://files.pikecreekreiki.com/uploads/1/3/1/1/131164128/7d6a98acf475b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/lafoweramekipijiwuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7329/6789/files/augusto_cury_ansiedade_3_ciume.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/4038413185.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/72657357186.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/c_linq_select.pdf
    • https://cdn.shopify.com/s/files/1/0434/6170/5890/files/25806537769.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/vutofopugopasumudovebajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/old_age_pension_application_form_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/bsc_5th_sem_physics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/9345/8070/files/ponirefamusajosubalawa.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_off00005e95.bin
4bd44388d90d21b61b853665a4b2905f86494e8a59f1523fea5bd607b45efb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E95 5012 bytes
font_01_sfnt_off00006f72.bin
7f9aa12656387fe66522458667c4759fd217398423517306bc57f7fe5012b9b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F72 14396 bytes
font_02_sfnt_off00009c33.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C33 4324 bytes

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