Malicious PDF — malware analysis report

Static analysis result for SHA-256 f030cde53cd5b9d8…

MALICIOUS

PDF

55.0 KB Created: 2020-08-10 18:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f94c1c3d839e2ada731f1784e8a101ed SHA-1: 6ccbe3d7077b273c869351450f8625077fa1a8ff SHA-256: f030cde53cd5b9d8808c659f7d6d2231be5665b043543d88b838c9c13f505dc6
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing on a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL. The presence of numerous external PDF links, many hosted on seemingly unrelated domains, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive 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=public+participation+in+policy+making+pdf
    • http://gonar.unitedchesed.com/uploads/1/3/2/6/132681342/5757975.pdf
    • http://files.totsruslearning.com/uploads/1/3/0/7/130776847/0bc1ac22bd95.pdf
    • http://files.bellanoirclothing.com/uploads/1/3/1/3/131382239/915188.pdf
    • http://files.maryse-alen-vedicart.com/uploads/1/3/2/7/132710786/papamegi.pdf
    • http://files.eyeformation.net/uploads/1/3/0/7/130776883/f71f8c7d48d3.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/94489039624.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/35448802457.pdf
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/bimepabojuwisejugitawuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/welunaxudukerajidez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/xaxasusarinulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/wowewoxonuzamazozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8589/files/aha_bls_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/dalezitowamosowozaxofigux.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/66974270831.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/apbt_books.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_off00008b1e.bin
5c68f0702c46fa1b743faa9ca007ecfa42e3dd4c78828d9b0a4c34149fb982ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1E 5368 bytes
font_01_sfnt_off00009d3b.bin
b9c48f16b94db3559fddc6627de13d8f7d05aa9365fb6dcc1dd17c26faa13f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3B 10224 bytes
font_02_sfnt_off0000c039.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC039 4324 bytes

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