Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfe7f398b02727c…

MALICIOUS

PDF

69.9 KB Created: 2020-08-26 17:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ce47241f920bfcff18f3a96f6f1d2e SHA-1: 6c8f600a0616eb4b182b8239d18bbce72830f03b SHA-256: 1dfe7f398b02727c60f561bcedd42157f750cc5aacaad1f650259cda9a043c87
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a redirector link to a known malicious domain. The document body also contains numerous embedded URLs, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware distribution site.

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=%25D9%2582%25D9%2588%25D8%25A9+%25D8%25B3%25D9%258A%25D9%2586%25D8%25A7+%25D9%2585%25D8%25A7%25D9%2583%25D8%25B3
    • http://files.fredfreeman-figurativesculpture.com/uploads/1/3/1/3/131381540/1771518.pdf
    • http://nimolo.barefoottofino.com/uploads/1/3/2/7/132741009/8569925.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/buxosaforogi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/52884481959.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0440/7869/4565/files/powotuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3971/files/vewided.pdf
    • https://cdn.shopify.com/s/files/1/0457/0074/3324/files/hd_wallpapers_1080p_for_android_phone_girl.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/66810021401.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/57697460801.pdf
    • https://cdn.shopify.com/s/files/1/0461/7814/0323/files/77046696175.pdf
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/hp_4250_driver.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/vifosilanomukekidete.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/76516386954.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000d150.bin
01a933c8e7263a479013dd2760acd15db738c36350e52e42280e8777bce20904		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD150 31884 bytes
font_00_sfnt_off00008dab.bin
ca42d5ed38f04d35f6c6ef927e9c0e2abbbfec64d896d823d531a8752c72a089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAB 4068 bytes
font_01_sfnt_off00009b89.bin
469df2c28f5ae767038909ad3cc9ef79152c48a8498121ce2cf52c62556574da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B89 17452 bytes
font_02_sfnt_off0000b542.bin
7be1392cd8df8f99d184017fcd6b4580434579afc24d8e80623495d88c85d909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB542 8180 bytes

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