Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42efecb04c437ed…

MALICIOUS

PDF

47.6 KB Created: 2020-08-07 00:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6173bf690fdedfb8fec21a870a3772e SHA-1: 0eb1d7904932b70aa9bc689b0303ca46492ed6af SHA-256: e42efecb04c437edfaa387bd6e7adc4448a0183d0ba90c8a79e3fdafc52a4711
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'research papers' and includes the malicious URL, suggesting a lure to trick users into clicking. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic to distribute 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.com/pify?keyword=research+papers+on+cryogenic+rocket+engine+pdf
    • http://kabazi.empathsandlightbeings.com/uploads/1/3/1/4/131437689/galoregija.pdf
    • http://files.bellacalore.com/uploads/1/3/0/8/130814279/mumubimogamu-fupedevumebat-ropetiwajo.pdf
    • http://files.bestfenceonline.com/uploads/1/3/0/7/130776104/3845835.pdf
    • http://files.sayre-computer.com/uploads/1/3/0/7/130775808/c5ea177a2ad.pdf
    • http://files.the-tan-can.com/uploads/1/3/2/8/132815742/bupididaniv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/ielts_writing_task_2_samples_academic_band_8.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6099/files/august_month_current_affairs_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/november_2020_calendar_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/xowub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8572/5850/files/90652374225.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/green_gram_health_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/70010754487.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/polos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/censor_beep_sound_effect.pdf
    • https://cdn.shopify.com/s/files/1/0428/6837/5719/files/21914229546.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/36612958636.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
    • https://cdn.shopify.com/s/files/1/0434/9408/0677/files/sewawutedab.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_off00006936.bin
901aac1051d99252d6df421ab7681fd02af8a734c425c5a443730b647dd7ccd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6936 5344 bytes
font_01_sfnt_off00007b5f.bin
5467494f51efc538f84855d387c9b7273313ec1d6e3aa454350831db8c628529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5F 12500 bytes
font_02_sfnt_off0000a2eb.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EB 4324 bytes

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