Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43becc30a874ff3…

MALICIOUS

PDF

32.7 KB Created: 2020-08-31 09:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5596aa1514c4494edb3a6afb8b01da SHA-1: 93b53b80d0fe1050f9daeb2eb96d3a32714f6fc0 SHA-256: d43becc30a874ff3cacf3810cb1a479a55133e8829f529a73ff8ad74c7045f8a
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=power+electronics+solution+manual+ra'. The document body, though heavily obfuscated, contains text related to 'power electronics solution manual', suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links further indicates a link farm strategy, likely for SEO poisoning or distributing further 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/wix?keyword=power+electronics+solution+manual+ra
    • https://cdn.shopify.com/s/files/1/0432/2259/7800/files/55228820040.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/lubejulemanonafonal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/42216035177.pdf
    • https://cdn.shopify.com/s/files/1/0437/6281/1034/files/administration_vs_management.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/23657853184.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/faraday_s_law_of_electrolysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/76433381924.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/26760109464.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/96665299420.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/widomubuworikavavij.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/33310000232.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://static.usrfiles.com/ugd/b8c837_2614918459544740915951193849d94d.pdf
    • https://static.usrfiles.com/ugd/73c254_0250db4ed2cc4bd69ebbb8b269a94385.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004452.bin
55ef494e069b42835941a2d7ae88a34435f398e08822c7af1a5922b60f9aca51
pdf-font-stream PDF embedded font (sfnt) at offset 0x4452 5036 bytes
font_01_sfnt_off00005562.bin
0ab875e58d7267aa31ac3e917354ff91e5545745726a260666b6d0feb6f4201c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5562 9528 bytes