Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c2c16124ce037c…

MALICIOUS

PDF

51.0 KB Created: 2020-08-08 11:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ffa1de510e706d8ccbecf6c9b7dee7 SHA-1: 39f9a7348c2d5e53afd005073937fa38ec4877a6 SHA-256: f0c2c16124ce037cdacedaf6eee1e92a27a5e8a9a71c36d2e20426b629082b89
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, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=android+programming+tutorialspoint+pdf
    • http://files.vickijansma.com/uploads/1/3/0/7/130775484/vidivawivegujo.pdf
    • http://files.dragonfly-books.org/uploads/1/3/0/9/130969461/fupifotodamujaveraz.pdf
    • http://fobuw.compelation.co.uk/uploads/1/3/1/3/131383613/roduwolaxonana_perumexizegu.pdf
    • http://files.tlakelabs.com/uploads/1/3/0/7/130739165/retuvor-veroda-jixekerura-wuxokejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rexalomofovuwazeb.pdf
    • https://cdn.shopify.com/s/files/1/0449/4861/9419/files/lithium_iron_phosphate_batteries.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/tiroxujopumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/vakibefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/xosemazirapab.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/74929500913.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/tuxubaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/cedula_de_identidad_ecuador.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.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_off00007c21.bin
60760aef0d4f61bce340672238403615fab13b535a154dd7ec55290b90c68c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C21 5112 bytes
font_01_sfnt_off00008d5f.bin
2819e692cebc7ddc4d2d8d6a8986e86670c45fe2ad85e7ea9304c93d1cc6fdae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5F 10352 bytes
font_02_sfnt_off0000b0b9.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B9 4324 bytes

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