Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb90f7e6db80fbce…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 00:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b2356513e124587d45c7e1b8da066d4 SHA-1: c9d1b2cf430c99d50bdc37d385878e11c847c9dc SHA-256: cb90f7e6db80fbce0a34cc5d2301a17ed20a46c3413d6069bdb6fee60496806f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'Sample calendar template 2019' and includes the malicious URL. The primary malicious URL, https://ttraff.cc/pify?keyword=sample+calendar+template+2019, is likely used to redirect the user to a malicious site. The presence of many Shopify links suggests an attempt to blend in with legitimate content.

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.cc/pify?keyword=sample+calendar+template+2019
    • http://girotilo.sciencefreaktion.com/uploads/1/3/1/6/131606289/dogitovil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/71660609940.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/doragewotupepefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/jegileleneg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/professional_assembly_language_richard_blum.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/robbery_bob_3_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/cube_womens_road_bike_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/29276142867.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/fafamajetuwavomowiroga.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/51141180078.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/jenen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/bharti_airtel_limited_annual_report_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/dsl_linux_usb_boot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/reflection_refraction_and_dispersion_of_light.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/xerepiwapipel.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_off000066a1.bin
9a9bdd948534d78e966044e4870bb9e3f0c8452c9fcfc84a13f5eaf794db6892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A1 5256 bytes
font_01_sfnt_off0000785e.bin
4315561a4c494351a2d0aea53360c13c81463f004bc79dd08ef709a57f274ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785E 10316 bytes
font_02_sfnt_off00009bbb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBB 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.