Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcca8bdb04388b83…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 07:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1978fa8e6cefc6051a610aae3d31a07 SHA-1: c48daa00042269c587f0036f1b17107c6bf17d72 SHA-256: bcca8bdb04388b83113d24ec78fcc7355fc5880e84645eb94c703e81eb3515d6
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to artificially boost search engine rankings or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The presence of the URL 'https://ttraff.ru/pify?keyword=super+fund+performance+list' is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=super+fund+performance+list
    • http://files.ankorsvolunteer.com/uploads/1/3/0/7/130739693/fazijisuwojam.pdf
    • http://files.inharmonyliving.org/uploads/1/3/0/7/130739783/gasabol.pdf
    • http://files.unogroup-ucsd.com/uploads/1/3/1/0/131069819/tidekejepa.pdf
    • http://baxupako.springersofoz.com/uploads/1/3/1/3/131380600/wefawotefipokig.pdf
    • http://files.mepsabiotravel.com/uploads/1/3/1/0/131070859/wedakapukopowaropo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4202/8190/files/google_docs_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0435/2838/8772/files/genesevaror.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/rovujarebedabiger.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/armour_hot_dog_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/jusosakavulafoxakig.pdf
    • https://cdn.shopify.com/s/files/1/0433/1608/4891/files/61857708139.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/riesgo_electrico_peru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/jinatemofufixamipejuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/gebetaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/62434632954.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/29600318185.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/89555235330.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/architecture_cv_format.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_off00006daf.bin
161b124e7cd4bde9ec730c1ba00fdb1a243834062b78e0a26f6c4aaee512bed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 5404 bytes
font_01_sfnt_off00007ff3.bin
d17123c6cd425db840119c8539d30a87625c3075e58a4a1580101d0c5f905982
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF3 10320 bytes