Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58ebb60c0c7fcad…

MALICIOUS

PDF

50.4 KB Created: 2020-08-22 03:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 334cf5a8cee3dce84b4e7a5288ba00db SHA-1: d56ab2abaed647109ed62a7db5d6846a3514849a SHA-256: e58ebb60c0c7fcad42e5af6ddc04b6a38deba4c473e2783218d5be897d3fb463
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, specifically `https://ttraff.cc/pify?keyword=airtel+bill+in+excel`. This redirector is likely used to funnel victims to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to an 'Airtel bill in excel', which is a common social engineering tactic. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning attempt to improve search engine visibility for malicious 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=airtel+bill+in+excel
    • http://files.betheangel.com/uploads/1/3/0/7/130776040/234bfad.pdf
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/celebrations_around_the_world_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/chaser_pc_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/burowuwigobalov.pdf
    • https://cdn.shopify.com/s/files/1/0446/4774/3651/files/a._d._the_bible_continues_season_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/sefejufixoxisosifid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/pupoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/89789182090.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/sovif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/70914445688.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/wolatine.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6294/files/sesumilolenazogapeno.pdf
    • https://cdn.shopify.com/s/files/1/0429/6258/3711/files/71103689154.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/12049975318.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_off00007cac.bin
2639d5db93cebd5f92fd944e6083554338f1aceea8ee11651d3475b07c41aea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 4280 bytes
font_01_sfnt_off00008b34.bin
f6bb2665a62702fb49b70627669f12dd1cbf63337b6b9d3cf98d14c361e38cc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B34 10380 bytes
font_02_sfnt_off0000aeb9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB9 4324 bytes

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