Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4651b49a5076b7…

MALICIOUS

PDF

49.4 KB Created: 2020-08-24 21:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14acaa77143283d95bc5978b5f7187d5 SHA-1: 2f449e22264780105aa45e5940ff7583fae8fe62 SHA-256: 8d4651b49a5076b7f362953b7fb4da5a73fcda42ca32148aa9672c2a24c74848
152 Risk Score

Malware Insights

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

This PDF document contains a link farm and a redirector URL, indicating a phishing or scam attempt. The document body, though corrupted, suggests a lure related to a Huawei Y9 Prime 2019 camera guide. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The ML classifier strongly supports the malicious verdict.

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=huawei+y9+prime+2019+camera+guide
    • http://files.tworiverscampgroundandstorage.com/uploads/1/3/1/3/131381078/guwedikefipemuw.pdf
    • http://files.alexis5dollarbling.com/uploads/1/3/0/8/130874121/ketaliduvev.pdf
    • http://dasevax.mollymadefibreart.com/uploads/1/3/1/4/131438137/be6d66134dc9.pdf
    • http://mokozu.msmichellechang.com/uploads/1/3/1/4/131407921/darukuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/17538084794.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/tekowokesemijuxotokibaman.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/immunisation_schedule_qld_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/32983582660.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/importance_of_celebrity_endorsement.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/beyonce_lemonade_free_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/91900333922.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/calculus_by_thomas_and_finney.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/lilir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/amebas_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0439/8078/3774/files/padudamiveretud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6981/files/52683751429.pdf
    • https://cdn.shopify.com/s/files/1/0429/7654/2873/files/rti_application_format_in_gujarati_language.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/15096356347.pdf
    • https://cdn.shopify.com/s/files/1/0433/9990/5429/files/luziv.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_off000073f7.bin
5f506f96885c68285abb08013964e969243e5a1cdb180af6bb27fe8127c8fd8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F7 3724 bytes
font_01_sfnt_off00008134.bin
ba29015aba758f4e8e517ad689bf9d8216467e5ab955795849ef965300d51c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 5820 bytes
font_02_sfnt_off00009509.bin
6c588cbf440c3942061aef369405f8f8d045edd46d0bd533e99191f9541923cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9509 10052 bytes

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