Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b0fcc554534eb4…

MALICIOUS

PDF

46.0 KB Created: 2020-08-16 01:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d48da0bc9f32c1a003056a51fa714a32 SHA-1: ae8e0eb7429a67acaf637e43fde199d0b81a2efb SHA-256: f3b0fcc554534eb47a346d94bc836e838cbe9ef67b1489f5849108f807e99585
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used to create SEO spam or redirect users to malicious sites. One of the primary links, 'https://ttraff.cc/pify?keyword=idle+champions+arkhan+guide', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the same URLs.

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=idle+champions+arkhan+guide
    • http://files.ramiea2uri.com/uploads/1/3/0/7/130740561/a42641.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/jebif.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/5315357364.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/dabiparesavozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2771/8567/files/sifekekedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/cavatina_deer_hunter_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/benzetacil_eurofarma_bula.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2438/files/anemias_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0431/8455/4135/files/39287530767.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/topevakizomivasasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1623/1840/files/basic_applied_mathematics_for_physical_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/tewipero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0296/files/42844666586.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_off0000720c.bin
a9ae96f14244500ece0d9aad6f31dbed4929d94e29e492b48bc932e9e3c50ae3
pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 5488 bytes
font_01_sfnt_off00008484.bin
f9a0ee81603afdef50d2b25f43121f18c546b5b858adc6557952d1556f812ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8484 11524 bytes