Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c06ae2cfc97db49…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 15:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7243c4d363cc5034c52240493f6b592 SHA-1: a338b9c9ee81342dc3ac5e375c5edc4ec02e0b69 SHA-256: 9c06ae2cfc97db49c017bdcc9e5d5a9cf471a101af8f068fc8b747ce222d09b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'asbestos removal procedure pdf' and the malicious URL. This suggests a phishing or social engineering attack aiming to redirect users to 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=asbestos+removal+procedure+pdf
    • http://files.sftint.com/uploads/1/3/0/7/130775893/f9d2c614b1f.pdf
    • http://files.villageyogaworks.com/uploads/1/3/1/0/131070362/gopepugoku_vezubiberaleg.pdf
    • http://files.jeebdesignfishers.com/uploads/1/3/1/0/131071164/9181067.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/gaboputasozera.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/6563471793.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/amplifiers_and_oscillators.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/14204167603.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/botaduwefarosezefixoxul.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/android_9_pie_update_pixel_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/45766732466.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/20433454383.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/mapa_metro_de_barcelona_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/fire_emblem_gba_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0438/2933/0082/files/46920984189.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/46458480429.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/14712489360.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/79885113839.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_off000066cc.bin
e5adb3d332ad2f57d00287a66e4211c5a389e5f0b1d1f4459685dffa9c4fde8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 5220 bytes
font_01_sfnt_off0000788c.bin
4e324c43e9b19ea9a197c58c97e05d1e87aa9754feb89e41b65dfa35f9b5f79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788C 10192 bytes
font_02_sfnt_off00009b66.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B66 4324 bytes

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