Malicious PDF — malware analysis report

Static analysis result for SHA-256 546e1cbb4ac08729…

MALICIOUS

PDF

48.3 KB Created: 2020-08-14 22:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9356908db25626af8856f13f95f7523 SHA-1: 8fc79f95278c6bf52d613135e52637e1290fa179 SHA-256: 546e1cbb4ac08729421ee89d30980d281adf0c3c3359c49ba1650ab2f225576e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirect. The document body, though heavily obfuscated, contains the same malicious URL found in the redirector heuristic. The primary attack pattern involves luring the user to a malicious site via a disguised link.

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=best+free+workout+timer+app+for+android
    • http://rodafulab.gcshadesandblinds.com/uploads/1/3/0/9/130969761/taxibisoragikulifez.pdf
    • http://files.kingcountyexplorers.com/uploads/1/3/0/7/130776875/e7a3d.pdf
    • http://files.danielglessner.com/uploads/1/3/0/9/130969993/bomojimupep.pdf
    • http://lovoneref.creativefringe.net/uploads/1/3/0/8/130874493/rotadewuxozimitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/mapping_cardinalities_in_dbms.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/funewedu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/77450694017.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/asme_pipe_standards.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4103/files/16792766569.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0348/9954/files/greenhouse_gases_and_climate_change.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/vagapirezafefuluzogulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/60137889802.pdf
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/dsl_extreme_webmail_login.pdf
    • https://cdn.shopify.com/s/files/1/0449/3488/9627/files/prove_negative_binomial_distribution_is_a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/47488302558.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/manixivofudemazukibogelap.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_off000071d1.bin
98d1f69dd0ba2889cf276049231eb38165ccea929d7e032e70f8c8bed3e9ec74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 5244 bytes
font_01_sfnt_off00008399.bin
7d459fcc636c46b1559459375951b98c85aebe6cf6f34962267498c641aee054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8399 10096 bytes
font_02_sfnt_off0000a621.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA621 4324 bytes

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